Touch Display Driving Method Interleaving Sub-Touch Periods
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Solution Overview
Problem
Existing touch display devices have a low report rate due to detecting touch signals only during the refresh period between display pictures, leading to ineffective command reception and impaired user experience.
Innovation Solution
A driving method for touch display devices that interleave display and touch periods, allowing for multiple sub-touch periods within a frame to enhance detection frequency, with control signals managing transitions between display and touch periods to prevent signal interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If touch signal detection is performed only during the refresh period between display pictures, then display quality is maintained, but the report rate of the touch display device is low
Solution Approach 1:
The frame period is segmented into multiple sub-display periods and sub-touch periods. The touch period is divided into at least two sub-touch periods, allowing touch detection to occur multiple times within a single frame. This segmentation enables the system to achieve a higher report rate by detecting touch signals in multiple separate intervals rather than in a single refresh period.
Solution Approach 2:
The patent dynamically adjusts the timing and duration of sub-display periods and sub-touch periods within the frame structure. By making the period allocations flexible and adjustable, the system can optimize the balance between display quality and touch detection frequency according to different operating conditions, thereby improving the report rate without compromising display performance.
2Productivity
If multiple sub-touch periods are introduced within a frame, then the report rate is enhanced, but the complexity of the driving signal control increases
Solution Approach 1:
The patent implements a periodic frame structure where each frame contains a display period and a touch period with regular sub-touch periods. This periodic arrangement allows the control signal to follow a predictable pattern, simplifying the control logic despite multiple detection intervals. The regular repetition of sub-touch periods within each frame makes the signal control more manageable while still achieving enhanced report rate.
Solution Approach 2:
The control signal acts as an intermediary that coordinates between the display module and touch module. By using a unified control signal structure that manages both sub-display periods and sub-touch periods, the patent simplifies the overall control architecture. The control signal serves as a mediator that harmonizes the operations of different modules, reducing the actual control complexity despite the multi-period structure.
Data Source
AI summary
The present application relates to a touch display device and a driving method for the same, which can improve the report rate of the touch display device. The driving method for the touch display device comprises: setting a display period to at least comprise two sub-display periods and a touch period to at least comprise two sub-touch periods, and arranging the sub-display periods and the sub-touch periods so that there is one sub-touch period interleaved between two adjacent sub-display periods; by a control signal, controlling the touch display device to enter the sub-touch periods from the sub-display periods, and controlling the touch display device to send out a touch signal; and by the control signal and a driving signal, controlling the touch display device to enter the sub-display periods from the sub-touch periods, and thus enabling the touch display device to display a display picture.